Re: [TCLCORE] TIP #293: Argument Expansion with Leading {*}

[Will D. <wi...@wj...>]

On Nov 2, 2006, at 5:25 PM, Robert Hicks wrote:

> Neil Madden wrote:
>> On 2 Nov 2006, at 23:12, Miguel Sofer wrote:
>>>  TIP #293: ARGUMENT EXPANSION WITH LEADING {*}
>>> ===============================================
>>
>> Still digesting this, but one point leaps out at me:
>> ...
>>>     2. The usage of both *{expand}* and *{}* will be deprecated.
>>>        However, both idioms will remain enabled as alternatives.
>> ...
>>
>> What does "remain enabled" mean in relation to {}? Does this TIP also
>> enable {} as expansion syntax in the 8.5+ line?
>>
>
> Oh yes, why would you do that? There should only be one idiom for
> expand. You shouldn't leave alternatives in as that is just asking for
> abuse.

ActiveTcl 8.5 (though not, IIRC, the core Tcl builds) supports {} as
an alternate syntax for {expand}.  I remember Jeff Hobbs talking about
it at the conference in '05.

I believe the notion was (Warning! I might be making this up!) that
we might eventually have several syntax escapes of the form
{expand} or {this} or {that} or {<your word here>}, but that
{expand} was likely to always be the most common, therefore if
the word were left out, as in {}, it would be reasonable to let
it default to {expand}.

Me, I like {*} better.

Will

>
> Robert
>
>
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